Milltek Sport OPF/GPF-Back Resonated Stainless Exhaust with Twin Polished GT90 90mm Tips for BMW 1 Series M140i F20/F21 LCI (2019+) 3 & 5 Door Hatchback B58 - Rear/Axle-Back Back Box Performance System, OPF-Safe

Milltek Sport stainless rear section for BMW M140i F20 F21 LCI OPF with mirror-polished 90 mm GT style tips

Give your BMW M140i a richer soundtrack and premium finishing touch with this UK-made stainless performance rear system from Milltek Sport. Designed for the 2019-on LCI models that use a petrol particulate filter, it replaces the pipework and silencers after the GPF to deliver a deeper tone, crisp overrun character and a tasteful factory-plus look thanks to the polished 90 mm GT tailpieces.

Built for drivers who want quality, sound and a perfect fit

• Aerospace-grade T304 stainless steel throughout for corrosion resistance and long-term durability
• Resonated layout for a refined, daily-friendly note with an engaging growl when you open it up
• Mandrel-formed tubing for smooth flow and response on the B58-powered M140i
• Mirror-finish GT90 twin outlets that sit beautifully in the M rear valance
• Direct bolt-on using OE mounting points for a straightforward install
• Engineered to work with the factory GPF on OPF-equipped cars

What you will notice

• A deeper, sportier exhaust note without harshness on the motorway
• Sharper response thanks to optimised pipe routing and consistent bore size
• A premium look at the back of the car with larger, polished 90 mm tips

Compatibility

• BMW M140i hatchback 3 door and 5 door
• Chassis codes F20 and F21 LCI
• Model years 2019 onward with OPF/GPF
• Retains the original particulate filter. Not for early non-OPF vehicles

Why buy this Milltek system from MJ Modifications

We have fitted and road-tested this setup on customer M140i builds and the feedback has been consistently positive. Owners love the deeper tone, the neat tip alignment and the way it stays civil on longer drives. It looks right, sounds right and fits right.

Installation

Professional fitting recommended. MJ Modifications in Warwickshire offer expert installation and alignment. Request a fitting quote or book your slot by emailing info@mjmodifications.co.uk.

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